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<!doctype html> <html> <head> <meta charset="utf-8"> <title>无标题文档</title> <script type="text/javascript"> window.onload = function () { var oli = document.getElementById(‘btn‘).getElementsByTagName(‘li‘); var obox = document.getElementById(‘box‘); var ali = obox.getElementsByTagName(‘li‘); var arr = []; var onff = 1; for (var i = 0; i < ali.length; i++ ) { arr.push(ali[i]); } oli[0].onclick = function () { arr.reverse(); var str = ‘‘; for( var i = 0; i < arr.length; i++) { str += ‘<li>‘ +arr[i].innerHTML + ‘</li>‘; } obox.innerHTML = str; this.innerHTML = onff?‘从小到大‘:‘从大到小‘; onff = !onff; } oli[1].onclick = function () { var arr2 = []; for (var i = 0; i < ali.length; i++) { arr2.push(ali[i]); } arr2.sort(function (a,b) { return Math.random()-0.5; }); var str = ‘‘; for( var i = 0; i < ali.length; i++ ) { str += ‘<li>‘ + arr2[i].innerHTML +‘</li>‘; } obox.innerHTML = str; }; } </script> <style> *{ margin:0px; padding:0px; list-style-type:none; } #btn{ width:1000px; height:60px; background:#F1F1F1; margin:0 auto; text-align:center; } #btn li{ display:inline-block; background:#009999; color:#fff; padding:8px 20px; font-size:14px; font-weight:bold; font-family:"微软雅黑"; margin-top:12px; cursor:pointer; } #box{ width:988px; margin:0px auto; background:#F1F1F1; overflow:hidden; padding:10px; } #box li{ float:left; padding:10px; background:#fff; border:1px solid #f1f1f1; } h2{ font-family:"微软雅黑"; font-size:16px; font-weight:bold; color:#00518D; text-align:center; background:#f1f1f1; padding-top:5px; padding-bottom:5px; } img{ width:225px; height:145px; } </style> </head> <body> <ul id="btn"> <li>从大到小</li> <li>打乱顺序</li> </ul> <ul id="box"> <li> <img src="img/5-1.jpg"> <h2>图片1</h2> </li> <li> <img src="img/5-2.jpg"> <h2>图片2</h2> </li> <li> <img src="img/5-3.jpg"> <h2>图片3</h2> </li> <li> <img src="img/5-4.jpg"> <h2>图片4</h2> </li> <li> <img src="img/5-5.jpg"> <h2>图片5</h2> </li> <li> <img src="img/5-6.jpg"> <h2>图片6</h2> </li> <li> <img src="img/5-7.jpg"> <h2>图片7</h2> </li> <li> <img src="img/5-8.jpg"> <h2>图片8</h2> </li> </ul> </body> </html>
学习了sort 和 reverse
return a-b 从小到大
return b-a 从大到小
return Math.random()-0.5 随机数
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以上
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原文地址：http://www.cnblogs.com/mayufo/p/4192644.html
